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HEADUP DISPLAY SYSTEM Main Switch Circuit

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DTC Code DTC Name
  Main Switch Circuit
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DESCRIPTION

The integration control and panel assembly (headup display switch) and meter mirror sub-assembly are connected via direct line. The meter mirror sub-assembly can be turned off and on by operating the integration control and panel assembly (headup display switch).

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WIRING DIAGRAM

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PROCEDURE


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    READ VALUE USING GTS (MAIN SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Head Up Display / Data List.

    5. Read the Data List according to the display on the GTS.


      1. Body Electrical > Head Up Display > Data List
        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        Main Switch Integration control and panel assembly (headup display switch) status OFF or ON

        OFF: Switch released

        ON: Switch pushed

        		 -



      1. Body Electrical > Head Up Display > Data List
        Tester Display
        Main Switch




      OK
      Integration control and panel assembly (headup display switch) condition displayed on the GTS changes with the actual switch operation.
      Result
      Proceed to
      OK
      NG

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    INSPECT INTEGRATION CONTROL AND PANEL ASSEMBLY


    1. Remove the integration control and panel assembly (headup display switch).

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    2. Inspect the integration control and panel assembly (headup display switch).

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      Result
      Proceed to
      OK
      NG

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    CHECK HARNESS AND CONNECTOR (METER MIRROR SUB-ASSEMBLY - INTEGRATION CONTROL AND PANEL ASSEMBLY [HEADUP DISPLAY SWITCH])


    1. Disconnect the G88 meter mirror sub-assembly connector.

    2. Disconnect the G5 integration control and panel assembly (headup display switch) connector.

    3. Measure the resistance according to the value(s) in the table below.


      1. for LHD:

        Standard Resistance
        Tester Connection Condition Specified Condition
        G88-9 (SW1) - G5-4 (ILU) Always Below 1 Ω
        G88-16 (E) - G5-16 (CH) Always Below 1 Ω
        G88-9 (SW1) or G5-4 (ILU) - Body ground Always 10 kΩ or higher
        G88-16 (E) or G5-16 (CH) - Body ground Always 10 kΩ or higher

      2. for RHD:

        Standard Resistance
        Tester Connection Condition Specified Condition
        G88-9 (SW1) - G5-5 (ILU) Always Below 1 Ω
        G88-16 (E) - G5-17 (CH) Always Below 1 Ω
        G88-9 (SW1) or G5-5 (ILU) - Body ground Always 10 kΩ or higher
        G88-16 (E) or G5-17 (CH) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE METER MIRROR SUB-ASSEMBLYClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR